skos:altLabel | - Joe Ledger
- Doctor Spectrum (Joseph Ledger)
- Doctor Spectrum from Earth-4290001
- Doctor Spectrum#Alice Nugent
- Doctor Spectrum#Billy Roberts
- Doctor Spectrum#Joseph Ledger (Earth-712)
- Doctor Spectrum#Kenji Obatu
- Doctor Spectrum#Powers and abilities
- Doctor Spectrum#Squadron Supreme (Earth-616)
- Dr. Spectrum
- Power Prism
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